This paper proposes a low power real-time packet scheduling scheme that reduces power consumption and network errors on wireless local area networks. The proposed scheme is based on the dynamic modulation scheme which can scale the number of bits per symbol when time slots are unused, and the reclaiming scheme which can switch the primary polling schedule when a specific station falls into a ba...

Rate-Function Scheduling (RFS) is a new deadline-based packet-scheduling service discipline that supports qualityof service guarantees for applications with real-time communication requirements. RFS is distinguished from other service disciplines in that it achieves all of the following goals: analytically-derived perjormance bounds, perjormance isolation among sessions, jlexible and eficient a...

Multi-core processors, are being implemented in embedded real-time systems because of the increasing computational requirements. And as the demand for concurrent processing and increased energy efficiency grows, power management is now of primary importance. This paper tackles the problem of reducing power consumption for multi-core embedded real-time system. the processor of the system is assu...

Based on lessons learned in developing and maintaining LITMUS, arguments in favor of an intensified collaboration between the academic and the open-source real-time communities are presented, and several ways in which ongoing efforts in these two communities may benefit each other are outlined. Some (unfortunately) commonlyencountered sources of friction and mutual misconceptions, which result ...

Many packet schedulers for QoS networks are equipped with a rate control mechanism. The function of a rate control mechanism (rate controller) is to bu er packets from ows which exceed their negotiated tra c pro le. It has been established that rate controllers lead to reduced bu er requirements at packet switches, and do not increase the worst-case delays in a deterministic service. On the oth...

In most real-time systems, tasks use remote operations that are executed upon dedicated processors. External operations introduce self-suspension delays in the behavior of tasks. This paper presents several negative results concerning scheduling independent hard real-time tasks with self-suspensions. Our main objective is to show that well-known scheduling policies such as fixed-priority or Ear...

The EMA (Energy Management Adviser) aims to produce personalised energy saving advice for EDF’s customers. The advice takes the form of one or more ‘tips’, and personalisation is achieved using semantic technologies: customers are described using RDF, an OWL ontology provides a conceptual model of the relevant domain (housing, environment, and so on) and the different kinds of tips, and SPARQL ...

We present a heavy traÆc analysis for a G/G/1 queue in which customers have unbounded random deadlines correlated with their service times. The customers are processed according to the earliest-deadlinerst (EDF) queue discipline. At any time, the customers have a lead time, the time until their deadline lapses. We model the evolution of these lead times as a random measure on the real line. Und...

Assimilation of lidar signals: application to aerosol forecasting in the Mediterranean Basin Y. Wang, K. N. Sartelet, M. Bocquet, P. Chazette, M. Sicard, G. D’Amico, J. F. Léon, L. Alados-Arboledas, A. Amodeo, P. Augustin, J. Bach, L. Belegante, I. Binietoglou, X. Bush, A. Comerón, H. Delbarre, D. García-Vízcaino, J. L. Guerrero-Rascado, M. Hervo, M. Iarlori, P. Kokkalis, D. Lange, F. Molero, N...

The aim of this work is to evaluate and to compare the elastic shakedown domain obtained by two different approaches, an incremental simulation realised with an elastoplastic constitutive law and a simplified method, in an axisymmetrical structure subjected to a cyclic thermal and mechanical loading. The elastoplastic model has been developed by Electricité De France and implemented in the Fini...